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Q1. | Which of the following can be used to isolate a low impedance from a high impedance source? |

A. | Emitter follower [Wrong Answer] |

B. | p filter [Wrong Answer] |

C. | Darlington pair [Correct Answer] |

D. | Any of the above [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ For a two port network to be reciprocal

Z

_{11}= Z

_{22}

*y*

_{12}=

*y*

_{21}

*h*

_{21}= -

*h*

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AD - BC = 0

⇒ When a complex signals is used to frequency modulate a carrier, the resulting sideband distribution is

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not necessarily symmetrical about the carrier

decided by the predominant sidebands

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none of the above

⇒ Brewster angle is the angle for which there is

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reflection and the incident wave is horizontally polarized

no reflection and the incident wave is horizontally polarized

none of the above

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50°C

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⇒ The transconductance curve of a JFET is

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parabolic

hyperbolic

inverted V-type

⇒ A single phase half wave converter is feeding a resistive load. Output dc power is P

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⇒ When the ac base voltage in a CE amplifier circuit is too high, the ac emitter current is

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constant

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⇒ The resistance R

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12 Ω

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⇒ The gap width in audio heads is about 0.01 mm.

TRUE

FALSE

⇒ The system in the given fi

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⇒ Consider the differential amplifier shown in figure. (Assume β is very hi

5 V

10 V

15 V

30 V

⇒ V(

*t*) across R

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*e*

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⇒ Consider the following statements about conditions that make a metal semiconductor contact rectifying

- N type semiconductor with work function φ
_{s}more than work function φ_{M}of metal - N type semiconductor with work function φ
_{s}less than work function φ_{M}of metal - P type semiconductor with work function φ
_{s}more than work function φ_{M}of metal - P type semiconductor with work function φ
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1 and 3 are correct

2 and 3 are correct

1 and 4 are correct

2 and 4 are correct

⇒

**Assertion (A):** The regular or irregular stacking of atoms has importanteffect on properties of materials.

**Reason (R):** The arrangement of atoms in a given material can be studied using X-rays.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true but R is false

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⇒ The pole zero diagram of an impedance Z has a pole at

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*f*_{c} - more than 90° out of phase when input frequency is higher than
*f*_{c} - less than 90° out of phase when input frequency is lower than
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1 only

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⇒

**Assertion (A):** In KVL equations involving mutually coupled circuits the sign of M terms can be positive or negative.

**Reason (R):** Dot convention helps in determining sign of M terms in KVL equations.

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0.208333333333333

0.416666666666667

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20 A

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It is usually made of brass or aluminium

It is usually rectangular or circular in shape

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